intala, somnuek, and Kunnika Vaisopha. “Study of Competency of Teachers in 21st Centery Under Loei Primary Education Service Area Office 1: Study of Competency of Teachers in 21st Centery Under Loei Primary Education Service Area Office 1”. RATANABUTH JOURNAL 5, no. 1 (April 30, 2023): 228–239. accessed October 5, 2026. https://so07.tci-thaijo.org/index.php/rtnb/article/view/2533.